The Orange County coroner's office was trying to determine the identity of a man killed in Fullerton early Saturday morning when he apparently ran onto the southbound lane of the Orange Freeway south of Imperial Highway.
The man was seen squatting by the side of the road just before he jumped up and ran onto the highway, where he was hit by a truck traveling at about 55 m.p.h., said Rick Plows, supervising deputy coroner.
Plows described the man, who was killed instantly, as 25 years old, 6 feet tall, weighing 250 pounds, with blue eyes and brown hair.
The man was carrying no identification.
He was dressed in blue pants, a white shirt with thin stripes, a blue sweater and dark shoes. He had an old scar on his chest, Plows said.
Anyone with information about the man is asked to call the coroner's office at (714) 647-7410.